Squirming and sidling through the tiny front barroom at Crazy Fox in Newport, I finally leap up the two steps that lead to the back room, where Duppy A’Jamba is rocking out for a packed house. I see the familiar faces of friends and join them on the perimeter of a jam-packed dance floor. Duppy frontman J Duckworth is a dancing, dervish hybrid of Peter Tosh and Joe Strummer. He punches the air with boisterous barks and shouts, straining a voice already ragged and raspy. And it's still early in the band's first set of the evening.